Personally, I don't see anything wrong with your rule with exception of one little thing,
but you haven't provided much of a context you are trying
to test your rule in anyway. For it to fire, you have to have
a fact (numerrores N) where N>1 in your facts base,
and change (> ?error 1) to (test (> ?error 1)) because
(> ?error 1) isn't really a fact and you are tyring to match it
as if it were one.

hth,
-s

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